Enable holmes as pyroscope client and reports pprof event to pyroscope server

[Jun10ng]

#104

[Jun10ng]

demo on example/pyroscope

[doujiang24]

Need some doc for this new reporter, otherwise, LGTM.

[Jun10ng]

@doujiang24

[doujiang24]

we need some simple doc, for how to enable this feature.
Assuming that people already have a pyroscope service.

[cch123]

Holmes used a different approach from continuous profiling, I don't know whether it's proper to integrate the event triggered profile to conprof based platform pyroscope, have you already used it on your production env? @Jun10ng

[Jun10ng]

Holmes used a different approach from continuous profiling, I don't know whether it's proper to integrate the event triggered profile to conprof based platform pyroscope, have you already used it on your production env? @Jun10ng

Pyroscope can provides visual web view for holmes and user can both enable holmes and pyroscope-client.

not yet. we only use it on non-live env such as stress test.